Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d1ae7ccf85998effc362bc0b45b76bf9afb7635608db6afeabbac7b5666079a' 
  AND token = 'E/S/56PR0BQc2V6nhEEblyjbqehV7aPiXkQsJ32bTw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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