Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caaf3163793f1bd49a9c274d4c66056d0f48529e745e62f124432b26a671d11e' 
  AND token = '9VmPOx9K/DXHX0Zkl9vioVfGCvT27HwkDC8XDiW2P5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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