Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c5c744d13915168d234b7fa36e8b12b19e64b62babda8a4b1b5b4fad826e18a' 
  AND token = 'oxkb9ZssC0Uk/lpv4Y7MpcUW8Xu5qJR3LYtE9E5hjbg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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