Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97f6d385b9607577d9e99d868314b233fc6fb6011cdc5f754fe50a2bb4e64ad3' 
  AND token = 'L8c1jSjbI3iqhyH2mxcA/FAVJ+lHJf4bbdS5voocJaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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