Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d036493e498ba181488f26990b9239c6ebc9fb0607099ea2884a96a75ef3969' 
  AND token = '+BHegyPRwlmTnI+eWEa+FdkWgzwUkvXCX71SLwmBsd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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