Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cdb0c47b0e6e7be3965a6f2743f44be600f41bbc3fc570ce74f5ff5113cf984' 
  AND token = '7btVLZSwIcvMtolUUOhhcVFOE5hNV6v8bpM4lFom03E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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