Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c79e0b62dcc70658572c6535f76d948a0d0ad19032ee70e9ea36da3bdbad4fe9' 
  AND token = 'SW8InShaYPtgTOs3IcnwiSRWJcKMYFwxlhfoJJZsnDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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