Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7707d4a463cd4c530ee49932920e84fb242b92bc27e7958f43e1d5ab41784bd5' 
  AND token = 'o5EtflcSxcFXAoyiKnZBunLM+Iyh00i+jHW/AGbq6jg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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