Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1129658e6a9e474df74d9f640a9fdc0530a35359f41f160a0abf2267ab5f495f' 
  AND token = 'FlB1VY1NiceglX46m7BiRp74miiUcDOu/98x/IIAvAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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