Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8462fbec2958b1ef3c32261c2f12c856e35b4d740d6a63d8e5e1b264a9624b54' 
  AND token = 'uB9cIe1BDfwbij9G28Q5yRvXbv4oFl2AqCXAR3I/IDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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