Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'aa3824f350f27bde0fd91d233c14d6325422e14335181724e600991d585f583c' 
  AND token = 'DJiPDfUkq3QD5yegldsfYQx7mxSo5WClEDj5OyUPHH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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