Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '966da90a75ebb88c320a0195f542813a2236183c85d1ddb2abd131ab77798756' 
  AND token = 'K20Ef0nVqKXjy+PDu3KiEj4U9AQ/uW6d6cteM7sNuvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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