Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31fdae7128a67a91195e111524e1fe028a848ae748bbacf59e9099015f4b692a' 
  AND token = 'aEseCXFfOMrzOETJjSA+gL6n9HhE1JNRmRYs8R33b68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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