Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f75f1f51c71f79cb56eefa72b2d9f9e3b872e4dc7ae5640de77595d98a18e8cf' 
  AND token = '7IOuoMSad0gUsk+AyI3K3ojbluvkuDTzLCk0qLabQUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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