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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ef14a5742e0d33e8bf5b9ac9a248c98ad11924e6f48699bdb2d8482ed65060d3' 
  AND token = 'DSEU1eBNU2C30kiqYlw20l5bSEEk4BHQYKMmuRsP02o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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