Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b188e195c139a97aa499261ca66fce5f6e66a723aafbd204463c8f4a628da69' 
  AND token = 'aryu48xt0n1K9BwxitieI46e90dOD8kf1+svofx6mMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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