Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40ad115343166e748a7465d8837ff8b4023560a8e1481c65f60b9dbb746cb3d1' 
  AND token = 'dxIjNucSx6W05m12gGy37aqBc4C+xaMeozsVFSpL3vw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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