Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9490f4b3a8a24d087f021a0691b48920dced18c728e81743525e942c26e34ca' 
  AND token = '9fxl6KPQDs793uLqabvvBS32TGqR361gOV3lZAWeWqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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