Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c46ee789b21df9fc8be0b13abb1729ee6a1e79589ff6ae9137840ee817b4fd14' 
  AND token = 'lm40TV1/00YnkiplDwV8d4LFIwgndhwFt3iLGIOHWWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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