Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4329ed5083ddd1e1d38a065ae179eb75eb324a1135697c459d5ad0fdc6a5545' 
  AND token = 'DASRtAFSAqSyPc0lPzn2zvRM6Es/ljvGIp4mhrZ95J8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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