Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44c2decbcb41a1bb079482cc2f3e052364883acb6121c96f95b89ef90f27a8f8' 
  AND token = 'u1tMVrDSQgN9sSrfDwfVsXUcXmzKxJJTjnlkqILmck8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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