Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20b6060f7e0e6f422d480bfb57338bc758025685e0d482804a1f0edaa798239d' 
  AND token = 'AV0YfH3grvT2VDayqaM9OUatyGeJUe98cMXRaD64dUk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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