Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '885f5037a8bf1927b249e7471d4fc435265b9ea46bd2f82895792a5583b9c712' 
  AND token = '2guEMtA5ziuse63qkF35AxXj+o0U0CzePeCAyMHjues=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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