Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8bfe4af6fb3452b7bc39568583f3c69c5ae81e69180972fce3a66d7d3007fd7' 
  AND token = 'RXld2X8qeEv/UWx8qiyxBbKGNcT/G2jmwGG7Eq1v1y0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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