Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffdf7725a00bd3d107893a29ed354c725a440c3c3c5eca3333c7538766ab6851' 
  AND token = 'NgDxptEyWSdHN0gcGPgbG7KBD7ZMbU7mFchfcvKOLzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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