Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '865842af08a13ed6e42b151bb0d440b009a88d30cc2696c20dccb12d8eeb8360' 
  AND token = 'uWbVmVj0o7HWl4t428b652EAZrA/JTFbT5ecWanenvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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