Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b2c9ddc41e2447c339dad8dc5f29024436635b99ae623661bd784079a94233d' 
  AND token = 'YXKfm4z560rHMhwOnXxqJCWNOSR9imLKSctWj3DcWFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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