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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '873400acfa329db76e013d65a9c007397c407eb44bbb13261b7a3a042a60ea7f' 
  AND token = 'v29Zv1RwrgzZHy4owiQAPmtkAihC+urTh9PpB0rkSvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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