Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a9a431e03989846b12843203936001cef084948e8ba84e121e8706c8f507693' 
  AND token = 'RtStfa7yleUEhsSfEgEyNZyU4LNgI75vLtinHslVbxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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