Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8b388d244570eb538346e793d66a84828788a8c68545d1c56f8aed655cbbe7d' 
  AND token = 'XVTzMbcxkLxI7Zb3DIeRKkA3fwrzneZRtEh8RBh+2ts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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