Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13b6004a91a8ecaca3e7ea272bce2aaf6d8f41cc6a0cedc0916ecc57d8eecdb7' 
  AND token = 'nDv2hyx7XN4TFmK8jXJGeB45gideQFluq4TPU94ZtoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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