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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd89f5de1ea6bc88befdc15478a7bd0be192b0d01d6c3360f9b7482f642dd378c' 
  AND token = '757Keda8Dg7XFgmKPaPDt8TCFN8gZhCw+dMq72nrpaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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