Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '792acfef9c4ad76b53ff5669b692b3e8f1839da26d73f7960aca9b64ca61a7c8' 
  AND token = 'bqrhuZXY6mGvfpp+pCR5DN0av2MulHcgoZElqakYgC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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