Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a44abe43a699e2d4440246fd6b24f525dee0ccde4128d9e556daf0d3348bfc3' 
  AND token = 'xyEvPvmF2zqtoBKSG8f/4l7dqFI6O2Ci7ffNuwYIrOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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