Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fedd9904e65bba5f6332a1c1717661576685978d02dfd475ccc12731d4c0718' 
  AND token = '84wKVPARDvXlS8gomHp6wxIm9kIa/7k6OiTLefyYQCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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