Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96c314861891b376674bdc96526303cf08e59b607edc2e09f59fc7d6f4e83026' 
  AND token = 'Ov7imXNbVp46ohDVFG+1XXVwaN2g9gEPafKirLElY3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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