Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a018c9503f092182ea07465f062231ca778207822f0afbdf4f2733bd292c023' 
  AND token = 'zGKcfKu1yz4gEQ6YY8S3h6cs21hD4AMpOiAq/6dggVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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