Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3dfcd5a5bdeaf72d47cf08fa986f69ab86a6f8cea500658e4160784a7d6fb7a8' 
  AND token = 'ne79DdD0ot3MO1pb9gXFxBAmbxhHMky6ksbUucALNSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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