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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9671f1307f8a82e172e478affd3a5c6dc6a825df7497de1cd5d8593a7a3f420b' 
  AND token = 'gdCMbt6Q+vHjv0r9mw39f71tXtSRvZ6VvTVOD6EFQA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}