Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35533381f6c7a40e0758bf667989a8198f62ee5b414f7bd8c55273148a0e82e2' 
  AND token = 'Qwnnhe8DBOZSO4EFYcEnM4iA2P1nYJY02EIPt4iT7DE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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