Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d74c1b43b7f090f031f0537e91657b33812374b5bb1b17566b0c3dfaa126433' 
  AND token = '+ML3DogQrH95V5EOkqaZ6TBxo8BaPSLaXXWcmwh/LLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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