Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe35425e761ce13796eeb3ec6b50e8dfe4b645a9cbe235c20ab7653a979f2117' 
  AND token = 'GYNk0/60tu9VX79PxZ0/Hbt6JfFcwpXBeQAHSbw5Eag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}