Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c53efd322a14d605e1fd4f986c2e6fe14098435887485c5d203ca83fc9d92a9' 
  AND token = 'C6IRWncq5E7rDsvx14w+BydHV1aDhy+SB7IIBFLJg/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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