Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c149ba65903980105d9b6f6caf67c2182ba63318fc0dd024d299494c90413aa9' 
  AND token = 'LSEDdDb1Zy4ApsuWcQVn4kSD+2r0+KZLWf1c5zLNc9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}