Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c35b7e5dc008bf28f6fa94fbf9cbeb0d2d4b8edcd7000c83628884f3232300be' 
  AND token = 'YnaxD5lHNJtXHNlP5JS6ax1ju5ljdZ+uF/Eem1Udwk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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