Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9e3af5aebdb1be54218621efa5a905220aa555d7348580bba731e6674c26065' 
  AND token = 'OpoMganNnGpWuJw5ZfjTvD1eb10rbmLoLhxs++cEZqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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