Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f14b888be19547052d638e0ec0e851f208edbb01bab00b6dd205d7b37fff1240' 
  AND token = 'qFJGNzpGmOmcZ5kkNjHE569+Ye+RGCdrCp14S+G1ZeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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