Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9003483032870e9d7b0783672f770180e0e36963f31e3b01947cd27c614cd717' 
  AND token = 'OOSlIxQBJvrYUBH5V1+0HwLl1cSYKitCO3egl42kQl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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