Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f45d6cedf3aab2829cdeb336cd49359c163e3dc8e0bcb3f0db9a5e23476b9dac' 
  AND token = 'xpqA4TZ2FW2EXH+S9HYXRttdCsXy/iUCpEYw2dY0aq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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