Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a03e0145ab0c5aa2a8ebcc43397548403419a528eabb6c5ec4a17ad9e4ceda88' 
  AND token = 'Xzsu8T+92rF0b1LeOLo/mHOsMqF4I03uta6sQSq/5u8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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