Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba00654c0f069c92761f5af77d74931e6bef7485af9da7aade854aa1a3f696c3' 
  AND token = '3Vvw3luVr3fHZZqD2XRh0D6UG7IQeErDXD71d/q7jj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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