Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f655e827f0de89a7ebf3ceb800f0cef792ab6b42dd2b6d0b85203df5e4d9886a' 
  AND token = 'ItUpuncWODTQlEIySJwbq8SmgOqoyy67pjSW+i6d7eA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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