Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79bfb826c12bf13c4d757718ea61630b394c1439c295d02804a5064cf3dd0aa3' 
  AND token = 'lWqpbYXJN/baXty8i5b65PnsDhX3EsLVUuGNHZ2Mh3Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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