Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fe6652150d5216a2770ef47ad459b56f80d06d09c44e8ed9c67f465e5c8cde2' 
  AND token = 'AetsiOmxpe9vs3CkyNnI5UrRnCEWPlJ7D5kksy5vtXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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