Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1854efcaeced19926c9c722a14ecd1cef5130b61cf5aa7da9dd26f044e2f92d5' 
  AND token = 'jmUyRISmYC9A6dwE/q8AAC1fCYjRrRE90Ka+V7/OtNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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