Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '834d31aa560351f2349e56069fd73207247995cd55a12bf09f7bb9a47efd5787' 
  AND token = 'P/Rioa3ODr+Ro1hwQpMZDaO7i0k1wq5W/1qZrlpCat0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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