Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9846c34a0b3f0f532c7dba15613158eeea5cac96187227e7f2ab876ef9c46ee6' 
  AND token = 'NV9HR31w2jFumQPEjXFkFrVEjrvRdu3x7/2mVINnjaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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