Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02760b4c0b053956337430a1aae067aeb919b7084bb830d0742dbf0cbbd9a83f' 
  AND token = '5p7VJBVv1+y76Aj5lp5qtjjqUq5XLwbztjxSXrqsxxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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