Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e1baa4802fd1de7856e9b80b6c3356063be004959999d90ced129029c3ae3b3' 
  AND token = 'txwgh8OcmDYFRT0fy18pIkFHSA9KrGwLP+OopRlXxvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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