Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e493f2fae002319b35a229084d53ea49d765860fe738ce70650cc11f0cedc6d4' 
  AND token = 'vrHXkKM9SAJIwyvZi+BMWoVWj4Ec2HsmfpovAdEQjBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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