Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9acae748bc174301b2e48b059a3f2669554a82dc15f3f476c48bc8d4f007ca0' 
  AND token = '8Jm6P4R+fO6TmP4K0i2uHkoBXmKvZ1tzo9ECObg+QwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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