Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c73c5fbcb820496e22c17d9db74495470c3c74c78a7693433e119fc5e1b070e' 
  AND token = '+E6Xx38Sz4e3UcnADYwjz8xrx6xT03ec/u1OP5V5SMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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