Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b17d71da934e736ee5fb52743ea74bb85a91453aa37d91730eeb95b65931cc08' 
  AND token = 'u1naj9s5tOOmeIcTWXXfm2Z/Z+9+fnY6AgFihEEGgOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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