Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7acb98b2afb3bb5dd3df5925af1968f7a39fd3f61d9596cf48e9c50759d287c' 
  AND token = 'O29t2dxL1cuOBh6CyYoX4FR3ii7llPp5ptXYwIfmS6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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