Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30f035c8f79aa2560a54b4c5e60fe24a877859f6e0d28933e875f57cc3e2cbe1' 
  AND token = 'pV8ZIiHkOxG1gRio3bASI4tCroE08VqtVZLP1idW3/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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