Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6c97bc7d980e2666f76c056ca1fa69107e30e784f905175a364d703b0c2f24b' 
  AND token = 'P35EiWJaf/8hpaCdUp6u3+zmV3QOsRUZbb1pWCFkRko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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