Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7553d71ad5991f65f3e83002a249d7e8ec4e55d8ba70442187cf8503b2b37eb' 
  AND token = 'dq23xxowll9qb1emA9I2ResxSvxBV8zvGnQMh1aEwE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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