Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4253b899bd7c4ffa2d4f045d689b924c75aa0424811c08432a3a8c14055cee9' 
  AND token = 'sYfYqajjXuEiQrOiF9SlsBxAtgg48zWuu3Scr2Oatg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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