Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '171cda606e86c8b1afe33ede11f9366c9fad875c321a77b7e045f42f6f4768c8' 
  AND token = 'Y5qaXcc8gyInLgBoixWx9+n7b0dK9+ZCfRCApAKl9/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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