Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bbfd07c59fa4596ea8142e59f1abc28d39f47890143738e0a1cfbc4bebaa239' 
  AND token = '7N5bxzjfwPxEkWzgekTGeusHPRxFuBUrY2QR6jnIA4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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