Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0d1722648176cb889851000e494ff2652090db19ebc56bbc6d2d754f66a9d5d8' 
  AND token = 'MYyQwS2taLiNrIp/nLw08hPv9mizLyXkkWH2fbKoSuI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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