Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3502469d80c5da6d53877e01e14043177135521788a64156b7f0bd2c15604f3' 
  AND token = 'YYIvGxDVruPd7GYte9Wq12sZ7NM0syjw6WA7hkeXdxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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