Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9c0ea3ab064242fefa119a52cfeaffbb8a6d0018f2e5a7ffe90eab23acfd249a' 
  AND token = 'bwM6noH22Q2DAz16Tbkq6x0Tip2BMjPDB2ypuwJ0qec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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